If the installer did not start automatically, you will find it here: C:\IMSMAng\trayLauncher\exe\ArcGISEngine.
.Net 3.5 is a prerequisite for installing ArcEngine, if it is not installed on the computer you may download the installation program from here: '''[http://mwiki.gichd.org/mediawiki/images/0/00/dotnetfx35sp1.zip dotnetfx35sp1.zip]'''